4.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 4 - 2022 - Paper 1
Question 4
4.1 Choose a description from COLUMN B that matches an item in COLUMN A. Write only the letter (A–L) next to the question numbers (4.1.1 to 4.1.8) in the ANSWER BOOK... show full transcript
Worked Solution & Example Answer:4.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 4 - 2022 - Paper 1
Step 1
4.1.1 Advantage of ready-mixed concrete
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I - concrete has the same density throughout.
Step 2
4.1.2 Disadvantage of ready-mixed concrete
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H - delivery and pouring delays may affect the quality of the concrete.
Step 3
4.1.3 Boom pump
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G - uses a remote-controlled robotic arm to place concrete.
Step 4
4.1.4 Slump test
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F - used to determine the workability of concrete.
Step 5
4.1.5 Collapsed slump
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C - too much water was added to the concrete.
Step 6
4.1.6 Cube test
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E - compressive strength of 20 MPa after 21 days.
Step 7
4.1.7 Line pipe concrete
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A - uses flexible or steel hoses to place concrete.
Step 8
4.1.8 High-strength concrete
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K - compressive strength of 30 MPa after 28 days.
Step 9
4.2 State the minimum distance that excavated soil should be kept away from the edge of a trench.
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The minimum distance that excavated soil should be kept away from the edge of a trench is 600mm.
Step 10
4.3 Explain THREE safety factors that should be considered before excavation begins.
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A competent person should evaluate the stability of the ground.
Draw up a safety plan and take sufficient steps to ensure safe working conditions.
The planned trench excavation should be supported by a protective system.
Step 11
4.4 Describe TWO properties of steel shuttering.
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Strong enough to bear the mass of wet concrete without collapsing.
More durable than timber shuttering.
Step 12
4.5 Describe THREE methods that can be used to level a site.
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Filling a slope.
Cutting away a slope.
Using excavated soil.
Step 13
4.6 Name THREE components of shuttering that is used to support trenches.
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Folding wedges/Wedges.
Walling boards.
Poling boards.
Step 14
4.7 Name ONE property of block board used in formwork.
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Block board is lightweight.
Step 15
4.8.1 Identify the machine shown in FIGURE 4.8.
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The machine shown is a Tamping rammer.
Step 16
4.8.2 Explain safe handling with regard to hands and feet when operating the machine.
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Do not place your hands/feet near the moving parts.
Use both hands to operate the machine.
Wear appropriate PPE, such as gloves.
Step 17
4.8.3 Motivate why it is important to clean the parts of the machine after it has been used.
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Cleaning the machine after use prevents rusting and ensures it continues to operate effectively.
Step 18
4.9 Use ANSWER SHEET 4.9 and complete, in good proportion, the drawing of a vertical section view of the formwork for a concrete beam with the floor slab on both sides.
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Draw the vertical section view ensuring to include the shutter board, beam/joist, cleat, braces/struts, wedges, and fixing plates as specified.
